body,
html {
  width: 100%;
  height: 100%;
  display: flex;
}

div {
  position: relative;
  margin: auto;
  width: 120px;
  line-height: 64px;
  text-align: center;
  color: #fff;
  font-size: 20px;
  border: 2px solid gold;
  border-radius: 10px;
  background: gold;
  transition: all 0.3s;
  cursor: pointer;

  &:hover {
    filter: contrast(1.1);
  }

  &:active {
    filter: contrast(0.9);
  }

  &::before,
  &::after {
    content: "";
    position: absolute;
    top: -10px;
    left: -10px;
    right: -10px;
    bottom: -10px;
    border: 2px solid gold;
    // transition: all 0.5s; // 没啥用啊
    animation: clippath 3s infinite linear;
    border-radius: 10px;
  }

  &::after {
    animation: clippath 3s infinite -1.5s linear;
  }
}

@keyframes clippath {
  0%,
  100% {
    clip-path: inset(0 0 98% 0);
  }

  25% {
    clip-path: inset(0 98% 0 0);
  }
  50% {
    clip-path: inset(98% 0 0 0);
  }
  75% {
    clip-path: inset(0 0 0 98%);
  }
}
